Abdominal exercise apparatus



FIG. 1 is a top perspective view of the abdominal exercise apparatus;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a left side elevational view thereof with the right side elevational view being a mirror image thereof;

FIG. 6 is a front elevational view thereof;

FIG. 7 is a right side elevational view thereof; and,

FIG. 8 is a rear elevational view thereof. 

The ornamental design for an abdominal exercise apparatus, as shown and described. 